hi hickny,
you been looking at those little 90mm maks on ebay? not sure what they are like, they might be ok or they might not... i looked into them once and found one or t reviews. one said ok the other shoddy. for the price you pay for that tho you could (as others have said) get a bigger and better scope. I personally can vouch for the 8 inch (203mm) dobsonian. it will show you a stack more stuff than a little 90mm
good luck with your choice!