Can I ask what kind of metal detector you have?I think it would be fun but have no idea what to look for in a unit.I would be looking around old buildings mostly.
i have a few different ones but, mainly use the Garett AT Pro, we're talking about $600.00 for a package deal. Also have a Mine
Lab CTX 3030,$2000.00. I get too frustrated trying to learn the CTX and feel really comfortable with the AT Pro to put her down. Lol
Garret has a few lower end models that I hear are very good machines. I'd shop around sticking with some brand name companies like Garret, Whites or Mine Lab.
You could also check out the forums on treasurenet.com. A lot more knowledgeable people there that can really help you out.