I suppose at this point in the thread, I ought to jump in with some advice, should you decide you want to get one ....
If you're looking at VFD's, you'll want to have two channels. If it's induction heating equipment, you'll love having 4 channels. You want a unit that is battery powered; the tech guys tell me the scopes are misleading when using a grounded power supply (like a 120 receptacle).
Plan also on spending serious money on leads.