I can tell you from past experience that when I'm looking to buy, I search through about 5-6 pages. Don't sweat the bumping so much. They run a forum for trains and not an auction site, so wait a week or so, change the price, or just wait it out.
I re-read the instructions. Pretty clear. Copy and paste in 24 hrs is not allowed. After a week for sale, then you can.
Good luck with the sale.