u/nomorecrazystuff

So I ordered a Kobo Libra 2 Grade A - £220.

They sent me a Kobo Libra Colour (£210).

I initially wanted to send it back and get the right item, but now they don't have any Libra 2 Grade A's listed, which I guess is understandable as it's an older product. Clearly the one I got was a mistake.

So rather than swap it for a Grade B Libra 2, I thought OK, I'll just keep the Colour. I asked if I could do so and get a credit for the difference in price. They refused and told me I had to return it, otherwise the warranty wouldn't cover it.

Rather than go through this hassle, I though what if I take it to a store - normally they will process a refund there and then after checking that the item I'm returning is the one sent out. And could I then buy that item back in a new transaction?

Any store workers able to comment on whether or not I could do this?

I'm not running a business, but I will be reselling a lot of my sister's items which she is giving me to sell as she is a reforming hoarder. Most is new stuff.

I'm happy to treat it as a business since I guess strictly speaking it's not personal items, and I'm unlikely to go over my tax threshold anyway (retired).

If I treat the purchase value of the goods as £0 and submit a self assessment declaring the sale value of the goods on eBay, would that be the end of it? Or would this actually make things worse with HMRC asking me to register as a trader etc since I'm declaring trading income?