[infek]

for some reason it says i dont have enuff XP when i have 700 XP
and i_bMoney = 200

  new exp = hnsxp_get_user_xp(id);
   new cost = get_pcvar_num(i_bMoney);
 
   if (exp > cost || exp == cost) 
   {
    client_print( id, print_chat, "[%s] You gave me %s just to have a good time!", cost, PLUGIN );
    hnsxp_set_user_xp( id, exp - cost )
 
   }
   else
   {
    client_print( id, print_chat, "[%s] You dont have enuff XP!", PLUGIN );
   }

[fysiks]

Debug! Print out the values of exp and cost.

Also, you can change exp > cost || exp == cost to exp >= cost