Always happens - its a conjunction of ebays fee's and noobs who dont know where to source hardware for the correct price.

1) Sellers have to take a risk effects. For example if 25% of buyers scam the sellers then they have to increase the price more than 25%.
So if they sell $10,000 worth of hardware for $13,000 and they lose $1000 on scams then they still profit.

2) Because of this very few people risk and sell for PayPal. This reduces supply and the price is increased out of speculation.
People who want to buy have fewer options and have to pay more for it.

better to trade here, but use a reputable escrow provider - there are many options to choose from which some even being free

Obviously in terms of FutureBit Moonlander are least there are reputable distributers from different parts of the world