If you have too many offers to take S5s off people's hands let me know and I can help move those for ya
Seriously though, I do not think you are anywhere close to what people want for S5 or any current gen miner.
They are way overpriced at the moment. Mainly due to SPtech not having any SP20 stock and BITMAIN taking advantage of the 'home-miner', so the guys who did buy in bulk or currently buying in bulk are still paying $330 + freight at the least. That is the best deal I have heard from a 'larger miner' meaning he ordered over 500, but not the 1600. He told me he isn't spending any more on current gen because even with his 'cheap' hydro power and hosting that investing more than that at this time will disrupt his cash flow enough to where he 'might' be in a bind for an early order on next gen.
That makes sense to me and I am a n00b miner with a small home lot mix of SP20s, S3s, and S4s.
By the way, maybe you are an experienced guy, but to me, buying used SP20s is the way to go if you can find them. The S5s do not receive the same level of attention, especially if you have an issue. The SPTech people are top shelf and they work hard while actually addressing concerns of all sorts.