Things that play a part:

1. Highest level on each server
2. Supply
3. Demand
4. Your current level

If your on a new server and at or close to the highest level on your server it will be difficult to get good players for little T. Also if there is lots of token buyers around you on your level they are going to increase the cost of transfers since they are going to use more tokens for bidding for better players.

If your on a old server, middle of the road team on the server with not many token buyers around then there is always going to be good players around to buy for not many tokens because there will be more supply than demand.