Excluding textbooks for classes, I bought this for ~$300 (several several years ago as a special treat)
Most of my collection is thrifted/bought from garage sales (for a quarter to a dollar usually) but I do have a handful of nicer ones.
Early 00's I bought Dante's Divine Comedy in full size, parchment paper, stitched volumes, with paper covers. It's the most luxury print/pulp look I've ever stumbled upon. The three books set me back by €60 then. Adjusting for inflation, I'd risk they be priced at around €100 today.