Summoning the OzB force, when do you think it is appropriate to gift a "used"/ pre-loved/ second-hand item? This is different from re-gifting, where you recycle gifts. This is still buying the gifts but at cheaper prices, from garage sales/ pawn shops/ ebay.
Say, to a rellie? On Christmas? Electronics?
Say, to a partner? Valentine's? Jewelry?
Friend? Birthday? CD/ Vinyl?
It all depends on the gift, and the person. Obviously someone who loves antiques, or old vinyl, or genuine retro clothing etc. will not expect such things to be 'new'. Also, I'm going out on a limb here, but many chicks would probably not mind receiving a piece of second-hand jewellery, as long as it was high quality (i.e. gold or silver, 'real' gem or crystal), and 'as new' (not dirty/tarnished at all, and fully functional clip/s etc.).
On the other hand, some peeps would not be happy to receive any second-hand gift, of any kind.
You have to make a judgement call on each individual occasion, considering both the gift, and the recipient.