Selling Mathmos in US - Pricing?

Hello awesome people :)

I have a Mathmos Telstar and a Mathmos Pod (with two different colored bottles) that I unfortunately need to sell. I'm based in the US and plan on listing them on eBay but I don't see a lot of listings for either and am not sure how to price them.

Does anyone have suggestions for a fair price on each? I don't want to be ridiculously overpriced but I also really need the money right now as I'm struggling to pay my bills.

Thank you in advance!