Lots of copies available for two boxes of vintage opera recordings at ridiculous UK prices, only £3.99 each:
ebay.co.uk Mozart The Great Operas (9 cds) with Giulini's 1960s Don Giovanni & Figaro and Karajan's 1950s Cosi & Magic Flute - the Don & Cosi are especially fine.
ebay.co.uk Puccini The Great Operas (13 cds) including Beecham's super Boheme with Bjorling & de los Angeles, and the latter's Butterfly with Di Stefano, Callas's Tosca with De Sabata & Turandot, plus Trittico with Gobbi & a Fanciulla del West.
Bare bones presentation from Regis - no librettos etc - but also free postage (for the UK, anyway).
There are also several hundred small box sets this month on Amazon.de at €25 for 3, though they seem to be selling fast.
I picked up a trio of Mackerras' classic Janacek opera recordings, and postage for all three inside Europe was only €3.63.
Among many other things are Chailly's 2011 Beethoven symphonies (and Karajan's 1960s and 70s sets), Uchida's Mozart piano sonatas and an eight CD box of Barenboim's Orchestre de Paris recordings.
https://www.amazon.de/-/en/gp/promotion/A1RSP2NLLRDLFF?ref_=sopp_psp_A1RSP2NLLRDLFF&tag=shforums.de-21