Agreed - browsing classical music on Amazon nowadays is almost like a CD Supermarket Sweep.
The Du Pre box is great because apart from the brilliant playing and recordings, the repertoire is so interesting :
Elgar: Cello Concerto in E minor, Op.85
Delius: Cello Concerto
Saint-Saens: Cello Concerto No.1 in A minor, Op.33
Saint-Saens: Carnaval des animaux - Le cynge
Dvorak: Cello Concerto in B minor, Op.104
Dvorak: Silent Woods Op.68
Schumann: Cello Concerto in A minor, Op.129
Schumann: Fantasiestucke, Op.73
Monn: Cello Concerto in G minor
Haydn: the two Cello Concertos
Beethoven: Variations, all the Piano Trios an all the Cello Sonatas (with Barenboim and Zukerman)
Brahms: the three Cello Sonatas
J S Bach: Cello Suites Nos.1&2; Viola da gamba Sonata No.2 in D;
Chopin: Cello Sonata in G minor, Op.65
Franck: Cello Sonata in A (arr. Delsart)
Handel: Sonata in G minor HWV287 (arr. J W Slatter)
F Couperin: Les Gouts-Reunis (1724) - Treizieme Concert a deux instruments a l'unisson
R Strauss: Don Quixote, Op.35
Lalo: Cello Concerto in D minor
Boccherini: Cello Concerto No.9 in B Flat G.482 (Cadenzas by Grützmacher)
Bruch: Kol Nidrei Op.47
Tchaikovsky: Piano Trio in A minor, Op.50
Mendelssohn: Song without Words in D, Op.109
Faure: Elegie in C minor, Op.24
Falla: Suite populaire espagnole - Jota (arr. Maurice Marechal)
Britten: Cello Sonata in C, Op.65 : II - Scherzo: Pizzicato / IV - Marcia
Paradis: Sicilienne (arr. Dushkin)
Not all lollipops, which is the danger of these sets.
To echo what Tony said, it is worth looking out for soloists, but then you could say the same for composers. These are all bargains:
http://www.amazon.co.uk/dp/B000YPWBP8/?tag=pinkfishmedia-21
http://www.amazon.co.uk/dp/B00156ZWV0/?tag=pinkfishmedia-21
http://www.amazon.co.uk/dp/B001EOOC3W/?tag=pinkfishmedia-21
I am thinking of it as laying down wine; I have the rest of my life to enjoy it ... but then you do need to keep an eye out and grab stuff while it's in print. The CBS Stravinsky /Sony set has now gone (I got mine for £17), ditto this astonishing Messiaen box:
http://www.amazon.co.uk/dp/B001DCQJUO/?tag=pinkfishmedia-21
which was a game-changer for me - I used to be a Messiaen agnostic, but not any more.
palp
Spend while you can.