I've bought and sold a few things lately on Kijiji. I sold a DSL15 head from the front porch, set it up with one of my cabs and a patch cord, and the buyer brought his own guitar. Sold an unloaded 212 cab yesterday, also off the front porch. Sold a book on tube amp design from the window of my car in a liquor store parking lot. Bought a Mesa F50 the seller had set up on his back deck for me to test drive. Buying and selling with masks and 2m spacing is possible!