Where to find a microscope/what kind

Can someone tell me a good microscope to check my resin glands..not looking to spend a arm and a leg but would somewhere like radio shack have a microscope..and what size zoom should i be looking for (30x)?? Thank you

Ebay. Get a 30X-60X

i have one like this, works good, easy enough to use.

www.ebay.com/itm/230823935068

also have this, much better.

http://www.ebay.com/itm/281036881621

i got the radio shack one my hand is not steady enough for them so i got a jewlers loop with 3 lenses works great and it was less than 10 bucks at wally world