I'm currently running 1.8.8 and need someone to help with the update
willing to pay $50 ($25 before and $25 after) to someone in the U.S.
if you are using
MyBB 1.8.8 then there should be no need to pay high amount for updating it.
rather it would be better to update forum yourself. see
upgrading guidance
basic steps:
1. put forum offline
2. backup database
3. download modified files (if any)
4. upload
MyBB 1.8.10 files & run
upgrade script
5. follow instructions provided by MyBB upgrading system