The reason why it isn't selling is because it's basically a "noob" account.
Although its a good starter main/zerker, it doesn't really have any stats that "WOW" someone. To quickly and effectively sell your account for a high price, you need to have a number or "expected" skill levels, as well as a few "WOW" skill levels. Now, keep in mind that not all "WOW" skill levels are worth it. TBH, on any account but a main, I'd consider 95 prayer (turmoil) a "WOW" skill level. It is a complete waste of money to get your account 95 prayer before selling it (obviously if it is already 95 prayer, theres nothing you can do about that).
Example:
45 def 99 str 99 att 52 prayer (with some other good stats) would sell for around 100m.
45 def 99 str 99 att 95 prayer (with some other good stats) would sell for around 125m-150m. As you can see, its not worth the 200m+ required to get 95 prayer.
If you want to sell your account, get 85+ str, 80+ range, and 94+ mage.
On any zerker people will be looking for those stats, especially the mage so they can cast Vengence and Ice Barrage while pking.