Don’t use Amazon, for various reasons. Wyoming law lets me buy 18 bottles a year by mail/internet order, although there’s no enforcement mechanism. I built two sets of racks in the basement, which hold about 15 cases all told. Plus floor space for cases of screw-cap wines that don’t need to be racked.
I re-stock the wines we drink most often —zinfandel, rhone blends, bordeaux blends, SA malbec, riesling/Müller-Thurgau, chardonnay (some unoaked), pinot gris, a viognier/chablis blend, NZ sauv-blanc, and sparkling— by ordering a case as needed. I also scout the shops for interesting bottles and buy two or three at a time.
I order cases direct from favourite wineries such as Ridge and Neyers about every other year, and stock vertical selections. Right now, I’m opening 2008-2010 vintages for special meals and guests. (I’m a buff on a budget.)
Don’t know much about dessert wines. A friend gave me a bottle of Aussie Muscat that’s 'sposed to be killer with a fruit tart. But Mum and her friends are usually into the coffee by then. So it’s gathering dust.