Beethoven Symphonies, Klemperer, Philharmonia Orchestra, EMI, generally available at low cost, sometimes in a bundle with the piano concertos. Good, though some of Klemperer's earlier recordings (mono?) have significantly better performances. Recordings sound a bit dated.
Beethoven Symphonies, Norrington - complete set is very cheap (try to get it for £10 or less! - HMV?) - not perfect, but good. 7th Symphony in particular is good IMHO - very different rendition of "slow" movement. Dave2010