To keep it simple and meaningful, let's base it on one S5 at US$310 + US$47 shipping (based on your earlier post about shipping cost) for a total purchase cost of US$357 and then apply the other factors that are applicable to whoever buys it. Not everybody buys 3 units to save a little bit on shipping cost, pays customs/duty fees, pays the same kWh rates, can afford the time and the hassles associated with selling and shipping miners on FeeBay to recoup some loss in investment or a miniscule (if at all) profit that's not worth the effort and time, etc., etc. etc.
If you are going to be that negative about bitcoin mining, and that in a thread about one of the more efficient miners on the market, then you subscribed and signed onto the wrong thread!
In one breath you rubbish the "miniscule" amount that can be recouped from selling on an S5, yet you profess not to have enough to buy more than one. Fine, it is possible to mine solo and strike it lucky by finding a block, but generally the rest of us get by OK via pool mining where the earnings (in your instance of a single S5) are miniscule whence compared to the entire block. But hey, we get along nicely, thank you very much.
In any case, I believe the point that was being made (and was emphasised just in case ...) was that if you are going to compute ROI on the S5, then it is only financially prudent to take into account the residual value of the S5 at that future point where you estimated to hit the ROI (in which case you have actually surpassed the break-even point if you are following). I actually identified with that posting to the extent of not growing attached to a mining rig and treat it as a mere mint .... shift them while you can get a good return on them and be ready for the next big thing (which in the bitcoin market is more often than I care to think).
Why are you getting too defensive about nothing? Is it a subconscious manifestation to justify your S5 purchase because you realized that nothing else could after crunching your numbers? With your "a thread about one of the more efficient miners on the market" line, you almost sound like a talking head for Bitmain but I doubt that you are though; most likely just a fan.
Who appointed you the "public" forum police or the chairman of the committee in charge of approving membership in this "public" forum? What is negative about my post? I was merely expressing my position/opinion that I "personally" cannot justify purchasing S5 units at $310 + shipping as much as I want to in consideration of the recent price drop. You said, "yet you profess not to have enough to buy more than one"; just where exactly did I state that? FYI, the "single S5" that I indicated was meant to be a starting point to base the computation on (and then multiply it by actual units to be purchased) and not a declaration of the quantity of S5s to purchase or can afford to purchase. You should have reread that particular sentence before finalizing your discombobulated reply.
If you disagree and took offense (hence your defensiveness) of my "hassles associated with selling and shipping miners on FeeBay to recoup some loss in investment or a miniscule (if at all) profit that's not worth the effort and time" statement, please show me actual P&L figures to support a realized profit that resulted in such a resale of a unit and I'll tell you then if it's miniscule (if at all) "for me" or not. I suggest to read my last few post carefully to get the gist of my point. To sum it up, it's all "relative and subjective".
If you're happy with your S5 and you justified your purchase/investment in your mind, then knock yourself out. To each his/her own. But please don't pervert my statements to accomplish your justification. That's not cool, bruh!