Keeping current prices wouldnt be that hard. Get your web designer to make a spreadsheet you can change and upload every morning. I use to do this for the gamestore I use to help run. Took like 10 mins each morning to update and it kept my phone from ringing off the hook with how much you pay for this calls. Here are 2 examples of how easy it can look and your customers will be happy for it. Just my $.02....
http://66.166.133.189/fc/price.asp
http://boardsort.com/payout.php