Just keep the hammer, they're not worth any money even though they are rated as either the best or one of the best, that particular framing hammer new sold for around $25 depending on how old it is, today new that one is about $35 but the new one has a blue handle. Just take some steel wool and take the rust off, give it wipe down every few months afterwards with WD40 on a rag to try to keep the rust at bay.