Hi Rebecca,

I would name the price you are happy to accept and if they aren't happy with that then so be it. You can work out the average price that people are willing to pay by doing an advanced search for "glow worm" and ticking the "Completed Listings" box. (Advanced search is on the top right-hand side of any eBay page) If the prospective buyer is happy with your proposed price, as long as there are no bids on the item, then you can add a Buy it Now price.

If it already has bids you can end the auction to the highest bidder (the person who contacted you), but it is a bit iffy about getting them to pay the agreed price and not the price that the auction ended at (if that makes sense!).

Another way to do it if you already have bids is to end the auction and relist it with a Buy it Now price, but this will cost you more in fees.

Good luck!