What was the most expensive record that you ever bought ?

Steely Dan’s Aja from Discogs. There was a review on you tube where someone did a shootout with 6 versions of Aja. He determined that the “Cisco” was the best. So, I gambled $400 based on his review and it is awesome. I cannot spend that or nowhere near on a record collection. Therefore I continue to upgrade my digital gear so streaming sounds good. 

@mikelavigne 

I agree and will not derail any further. I don't know which isolation thread is most current/relevant but in the meantime, I will scour your links. Thank you. 

Mobile Fidelity “Original Master Recording “ ( whatever that means) of The Beatles White Album in about 2000 for $75 in mint condition. 

Funny this subject came up. I have been on strike for the last 9 weeks and it has given me some time to clean and catalog my collection I'm not done yet but have been shocked as to what I have come up with thus far.  So far, the highest value for a single record has been Dido Quiex SV-P pressing median price $481.00, three for sale from $1,612.00. I paid between 20 and 30 bucks. The highest box is the Mo Fi Beatles Collection median price $825.00. I got that a few years back with the Rolling Stone Mo Fi box and the Sinatra Box for $900.00. But my prize is Alice in Chains Jar of Flies/ SAP autographed copy going for a median price of 300 buck, without the signatures. Who knew my record collection would do better than my IRA?