Best bang for the buck


What’s been the most cost effective item you purchased for your system? 
I will go first- a Zerostat I bought 40 years ago. Next most cost effective purchase has to be a Denon DL103R cartridge which I bought new for $300. 

zavato

Well shoot me but back in 1973 I got a,pair of Bose 901s  2 one year old,with stand and another lumber yard round block of wood.To raise the 901s to ear level...at the time the 901s were going for like $550 fair traded....no discounts back then plus taxs..I got them for $315....cash...I loved my 901s....so there....lol.Had them for years then they need 18 speakers replaced...they are now in Speaker Heaven. 

Recently that would be the Riverstone Audio  Stylus Gauge.   Excellent product for cheap.     Another product I think is a huge bang for the buck is Ned Clayton's SUT.   Great product , build and sound quality is high for the price 

VPI HW-16 record cleaning machine when they first came out.  Serial Number 15.  I put the .5 upgrade package on it when it first came out also.

Had this unit for well over 40 years now.  Has cleaned thousands and thousands of records.  Still going strong.  Never any problems.

Needless to say...paid for itself many times over...