Anyone have a good idea why when the bitcoin price rises, the old models such as s3 and s4's market per gh price stays around the same and not increase like it did back then?
Why would the price increase? The price of all Hashnest miners is in USD, denominated in BTC. So when BTC rises, you need less BTC to buy these models.
B/c as the $USD price increases the maintenance fee tied in BTC lowers which actually earns you more BTC. If you earn more BTC, and the price increases in $USD you are still mining more profit.
I get what you are saying, but it's a bit backward for the prices to be slashed so much as the life of the miners seemingly just got twice as long on Hashnest from the increase in bitcoin price.
Edit: New price of S7 is $2283 in the shop