Hi, I need advice regarding Canon 17-55mm. Somebody is selling me $780.00 with Hood and some dust inside the glass and one is $848.00 with hood and Tiffen UV filter but it is clean no dust. which one should I get. Help please need to buy it tonight and use by the w.end. One more thing, should I be concern about some few specs of dust inside hte glass or I don't need to worry about it?Thanks!
Hernan
, now have 400do;500f4is,600f4 


