The recent eBay listing for Selected Letters topped out at £552.93 with 24 bidders, with $60 postage to the UK. Setting a benchmark price of about £590 in total, for what is obviously a nice clean and fresh set destined for a collector. Scholars likely to extensively thumb and mark their copies will probably be able to get cheaper well-worn copies of the books.
Although within a year or two all the letters will be in affordable paperback anyway. Which again reminds me that we could do with a unified index that runs across all these. Possibly that might be issued in ebook as a fundraiser for Joshi’s Endowed Research Fellowship in Lovecraft.