Well you could make a level 3 skiller. If you love skilling that much they are fun to show off . If your into a little bit of everything though you could always make it a main and do all of that stuff at the high levels.
Well in my opinion skilling accounts aren't that popular and don't sell well because they can be easily botted and people pay for the skills as if they were botted. Most people these days are looking for a staker, pure, or something that they can enjoy/make a lot of money pking with. This is just my opinion. I'm sure if you got the account level 100+ with some high rare skills like Runecrafting or Farming you should be fine. Good luck!
70 atk 70 def and like 40 str would be a decent verac staker
as far as range boxer 99 range, and like 70 def would be good. (I don't know TOO much about staking so if this is wrong don't flame me)