There are any number of inexpensive Chinese microscopes available on Ebay for a couple of bucks.
The same scopes that sell for $4.00 on Ebay go for $20 in the hydro store by the way. While I try to support local businesses sometimes it's a no-brainer...
I bought a couple 45x LED lighted loupes, a couple 100x scopes that use AA batteries, and a couple of the cool little "James Bond Jet-Pack" jobbies, 6 scopes in total, and I don't think my bill was more than $35.00. They're so cheap I suggest you pick up a couple different styles, keep the one(s) you like, and toss the rest to your friends.
I ended up keeping one of each and tossing the extras to my grow partner. He picked out his favorite and passed the other two on. And so on. Spreadin' good grower karma baby!
I use the 45x lighted loupe more than anything else. The others require a steady hand that I just don't have any more!
There! I'm sure that's as clear as mud now for ya, huh?
Peace,
genEric