A formal link exchange generally refers to an internet based system that is set up to facilitate these sorts of link exchange. There are some well known link exchange systems on the web that are easily found via a web search.

Uncommon, McCoy owl patio lantern in white, gloss glaze. Perfect for Halloween or summer nights. 8-1/2" tall and in excellent condition. No chips, cracks or crazing and complete with handle and metal strip/candle holder on the bottom. There is, however, a factory flaw. On the side of his head, under the glaze is a 3-8" diameter spot of green paint.