Hope it's just the enclosure and check the disk separately.
Depending on what happened "maybe" you can succeed but nobody will do the job for you or guide you step-by-step for free. All you can do assuming ALL the risk is try to clone the drive but IF and only IF the disk is at least identified and is at least decently working. The disk CAN die during this "process" while with professional equipment this risk is minimized or close to zero. If the disk is isolated, worst case, I'm afraid there's nothing you can do.
The price you have been quoted is very low but I can understand it can be a fortune, it is subjective. You say you can afford max 200 , tell the guy (assuming he knows what he's doing) 200 take or leave.
If you wan to "buy" something , keep in mid that is in the THOUSANDS $ range and you should know how to use it so it's not an option.
P.S. I have the feeling, after this reply , that maybe the answer will be "OK tell me what to do, I'm willing to experiment now as I don't care anymore for data" (it's a movie we see veryday on these screens

) , in that case surf these pages and the internet and happy tinkering with free stuff and with the disk.