For trades and barters: Many many times. Several instances included trading 10's of names for a single name wanted to boost equipment portfolio. For barters, most consisted of a single name or small grouping of names for product or services that I either gifted, sold, used myself, etc. (car, hydro/grow eqpt [x2], welding eqpt, shatterproof window coverings, marketing lists, pwc lift, clothing, toys, electronics, solar generator...)
I highly recommend including bartering as an option.