I used to sell some gameboy covers like a year ago on eBay, being the only dude in Australia to do it, it was alright. Nothing major probably only moved around 100 cases over time, but then eBay shut me down with no warning around 6 months ago or so.
I realised it wasn't worth my time and the market just wasn't here. Plus I'm not willing to lose another eBay account due to idiots.
I'm hoping they don't crunch down on NES and SNES repro's, I've got so many to buy yet