Why don't you buy one in full, then build up your BTCs for the next purchase? I can wait. That way you are not in debt for some unknown payment as difficulty rises and the price may go up and down.
Also, you seem to be overpaying. BTC is momentarily low due to the politics of segwit2x - BCH is also rising in price as people protest using their wallets. But next week the US futures exchanges will start trading on bitcoin, and the price will be more steady and I believe it will rise to 10k-ish, making a 0.2BTC payment worth 2k come december. That makes your payment way above market price, and a very good deal for any seller.
I don't know if that makes you more or less anxious to get a miner.. But go ahead and make a deal with the other party. I suggest you offer him 0.2 flat, use the rest for a good PSU and be sure to use escrow from the forum - no funny fake escrow websites run by his cousin. Then with the BTC you earn and the price rise I expect you can buy other miners without debt in the upcoming months!
That's my advice, and I would be happy to take your excessively large payment if only I could get my miner back from hosting! But as it stands, it will take some time so I feel obligated to help you get the best deal for yourself overall.
Cheers!
hey I'm sorry but I had no idea i blocked you.
I didn't even know you could block someone, I'll try to unblock you if i can find it
if you can wait I'm okay with that, I'll let the other party know.
thanks