When has bitmain ever lowered price by 50% in subsequent batches of miners in less than 60 days and kept selling batches in the past? In my experience, antminers usually sold out quickly, and there was a limit to production. They kept price consistent. The other antminers didn't decrease in value by more than 50% in less than 60 days, like what's happening right now.
Miners have always started out at a high price for the first - second batches. Hell my s2 bought as soon as they came out was around $1,750 as I recall. Just before they were stopped to make way for the s3's the S2 price was around $1k. Most extreme was Bitmain's s1. Intro price in Nov/Dec 2013 was over $2,000. When I got into mining in late Feb 2014 they were still around $1750 direct from Bitmain (and is why I got bit by the AMT scam for A1 miners). I still did not buy in. But - by late March - I could get new s1's through Amazon for $750. That started my farm. Last s1 I bought direct from Bitmain was around what, $225?
Same applies to PC's. Want the latest CPU/MoBo/GPU and you pay mega top-dollar. Give it few months and prices drop dramatically (for the same components). Mainly happens so Intel/AMD/whoever can recupe their dev costs as fast as possible. Once those are at least mostly paid for then they can drop the price and now make profit off of volume. Just like the miner makers they know a ton of folks will pay premium prices for latest/greatest when it comes out.
Only difference is that the mining ASIC makers don't seem to think that there is a market for chips after a new gen comes out whereas CPU's and such may soon be outclassed by new ones but - the end user market mostly does not care so chips are used and made for years. Personally I would LOVE to see Bitmaintech or BitFury sell prev gen chips after new ones come out. I mean why not??? They should be almost pure profit considering all the production steps and setup costs have been paid for...