Bob Carver C-500 worth restoring and/or upgrading??

I have a Carver C-500 that I am the original purchaser of back in the 80’s.
It has been stored well, but has not been used for 30 years. I have a need for a good amp with some power to drive some DynAudio Contour 20 4ohm-rated speakers.
Can anyone "with experience with C-500s" tell me if the amp is worth refurbishing/upgrading? Where I should get it done? ...and a guesstimate cost range? I am looking for good work, not a cheap price. I also respect skilled, knowledgeable technicians... The unit has nostalgic value to me, so if it can compete with today’s solid state amps from a performance standpoint, once refurbed...I want to do it up, RIGHT!
At the very least I will need the capacitors replaced.
Any takers??? (Bob Carver BASHERS need not respond, although I am open to knowledgeable criticism of the C-500 with specific evidence! 😎).
Thanks guys!

Worth restoration? I'm not sure. My first question would be if the power transistors are still available. I would hate to put money into a restoration and then blow an unreplaceable component. 
Good question! That is why I need an "honest" skilled technician who I am willing to pay for his honesty, knowledge, skill and resources. 😬
Why not call Bob and ask? Think he is still here in Lynnwood.
"Why not call Bob and ask? Think he is still here in Lynnwood."
Funny....I filled out a form on the Carver site about my repair and got an email today from Bob's current partner in the tube amp business, Frank Malitz. I  decided to call and talked to him for over an hour about life and amps. (and not just Carver amps.).
They do not repair vintage product anymore but refer me to the one and only authorized repair service in Illinois that handles their repairs and refurbishing.  I am tending to do that, but would still like to hear from people who have actually had a C-500 restored and what it's performance is like, today.... Frank is a delightful, knowledgeable man who has a vested interest in the product...I just want a little input from people who are currently listening to a restored C-500 and how it compares to modern solid state amps, I guess....... Thanks.
Get a variac and plug the amp into it and turn on both with the variac set at zero. Slowly turn up the variac over a 12/24 hour period until 120 volts are reached. This will let the caps reform without shocking them with a sudden turn on. Next hook up the amp and have a listen. No hum/noise is a good sign that the amp is working fine and can be used without need for new caps.
If it continues working and sounding fine leave it alone! I'm sure the C-500 sounds as good as any of today's overpriced amps!
Audio Classics in Vestal, NY can restore/repair any electronic component. I bought a nicely restored SAE Mark XXX amp from them at a reasonable price!
Hi Jason...thanks for the input. I am of the mind to have the amp checked out by a skilled tech. It’s well over 30 years old and every knowledgeable person I have talked to says that the capacitors should be replaced. I don’t mind the inconvenience or the expense. I would like to feel that the unit is reliably functioning and running at 100% capacity.
Audio Classics looks like a really cool, friendly shop and could be a nice day trip for me....hmmmmm.....😎
Do they do their repairs on-site?

Edit: I did a little research- Audio Classics seems to be a McIntosh specialty house, right?
Audio Classics has been in business since at least 1990. Around that time I bought a nice PS Audio PS IV preamp from them. I bought the restored SAE Mark XXX several years ago - including the nice wood case! They do good work!
Yes, they have been a McIntosh dealer/repair since the beginning. Richard Modaferri (designer of several Mac tuners) worked at Audio Classics.
I have had great results with both Deltronics (Chicagoland/2 locations) and Bristol Electronics (New Jersey).  
JB...Frank from Carver says Deltronics is the only authorized dealer by Carver... BUT I live in NJ!  Cant you tell me more about your experience with Bristol?

I’ve had them restore quite a few pieces of Carver gear for me. He is an expert at Carver gear. Located in Michigan.
So...I am kind of becoming an expert on the topic! LOL! I have had all these "experts" telling me to replace the capacitors, blah...blah blah. The only Carver-authorized location has mixed reviews, for sure. Plus I would be shipping it to strangers...the cost of packing and shipping and potential for damage,  I finally talked to an HONEST, open tech here in NJ, who has a killer reputation and he works out of his house. Has worked on Carver before. He said that all the hyperbole about capacitors is horse sh*t! 🐎💩😬
He told me how to test my amp with a voltmeter (and it checked out fine) and I inspected and there is no leakage from the caps..They look brand the amp may work just fine. I am waiting for a Schiit Freya + tube preamp to get here (they are 6-week back ordered)...and I will get some junk speakers to test on in the meantime.  If it doesn't work out, I can take the 80min drive to Ho-Ho-Kus and drop it off in good hands.  I am finally getting somewhere. 😁👍🏼
Thanks for your input!, in Rockford, ILL..

call and speak with the owner or his son. They do great work.
the restore a lot of stuff.
great work!!

 If your close to Rockford, drive her there.