I have never seen a post where someone here mentions the inflation adjusted price of old gear and does not use the MSRP. Not once, ever.
They will say: "Back in 1977 brand X model Y would cost you (insert MSRP) which today is the equivalent of $ 2,000 but I can get a Yamaha A-S1000 for $1,299. IMO, they can't have it both ways.
Unfortunately, there is no directory that allows us to easily look-up the true "street price" of an audio item purchased years ago. Anyone who was not there or does not remember what they paid will use the MSRP for the old product but the "street price" for the new product. For example, A Sansui AU-20000 retailed for $1,000 back in 1977. Most here would say "Well that's $3,900 in today's dollars.." and then compare it to what a $3.9K "street price" can get them today. In fact, what they should be doing is using the "street price" of the 1977 unit which is harder to determine. I can show you a receipt for a brand new AU-20000 purchased in 1977 for $654 which is about the equivalent of $2.5K.
There's a big difference between what $2.5K and $3.9K can get you today. We should fair when we inflation adjust prices of yesterday.