rust repair

i have a 98 s-10 and the lower parts of the bed, and part of the cab have some surface rust in a few unnoticable places. i went to get an estimate to repair this casue i wana take care of it before it becomes something worse and they said it would be about 1200$. i went to a few places and they all gave me about this price. should i have it done professionally or do it myself?

any advice will be greatly appreciated

thanks