Second Hand Amp

[fizz]

hi all,
my mate is selling a 100W marshall amp for £50, (about $80?)
im wondering what to look out for,
its in fairly good cond. reason its going cheap is because its been there for a few years, and he has taken up bass, so its kinda not being used. Would there be any risks?

[ESP_Viper]

Well, if it works, hell yeah go for it. 80 bucks for any 100 watt amp is a bad ass deal. So don't worry about it too much, for that price.

[fizz]

hi - right - ive bought the amp now
and its a BIT odd.
picks up spanish radio signals.
got lovely tone tho.
now - when i try to run a pedal through it. it decides to be funny.
i have NO IDEA what the problem is
the pedal and cables work with other amps.
not this
any ideas?