1) Don't buy anything in life that is an non essential item if you cannot afford it i.e don't buy items if you are worried about depreciation
2) The repair costs on this model are higher due the Platinum bezel, you should factor this in
3) Their 2nd hand prices have gone up in the last 18 months, you could have got this below retail
4) I expect that long term if the market continues this way you'll get your money back selling to the trade, short term expect a slight loss