One can either copy that listing to one’s bookmark list or mark it on the epay watchlist. Either way works but epay clearly prefer the latter as they stand to gain from that! The seller doesn’t know it is being watched, if the former.
I watch to check whether some items, ridiculously priced, actually sell. Even when relisted, again and again (sometimes the price comes down to a sensible level). Some to keep abreast of current market values. Sometimes to collect together several different options on the same item to compare specs, prices, value for money etc. There is little incentive to remove those watched items, so sometimes I don’t bother.
Seller’s problems are theirs, not mine. I watch what I choose, with no consideration to the potential seller.