a simple vouch saying thank you would usually be what i give to most members on sythe, however lucster has exceeded my expectations by far, he garunteed me 35m for the service he provided on my skiller, he got me nearly 45m and 99 thieving! I stopped him short of the set target because I wanted to throw my own little party for trimming a cape and he had no problems with that. Seriously will be recomending him to all my friends who want 99 thieving in 2 weeks with 44m+, professional service and an all around great guy. most legit service on sythe.
edit - Also had 55m on my account in cash, he didn't touch a dime!