Since you're going for a second-hand one (I think
this is wise), buy a
well-known make. IMHO Tektronix are the bext.
Older Tektronix 'scopes (certainly up to the 465, etc) had excellent
manuals with schemaitcs (:-)), theory, etc. Make sure you get one (or can
get one). You will need it.
Tektronix scopes are always the best. But just got a V1100A Hitachi 4
channel-8 trace-digital-readout scope on ebay for $160. Like new condition
and with a pair of 150MHz tek 10x probes. The best scope I ever had, even
best than my loved Tek 455 and 465. Highly recomended. Philips are good
also, and easy to find info.
BTW, anyone with a spare copy of the V1100A instructions' manual?
Thanks
Alexandre