Bruce been into TM500 since 1970s. have a huge accumulation.
SC501 is cute but not so useful, SC502 is dual ch and much better, SC503 similar but wider BW.
The generators, power supplies and analyzers are great, and there is a set of scope CAL plugins.
The TM5000 seties is larger, fan cooled and include HPIB control.
See the TEK WIKI and BAMA archive for the full list of modules and manuals.