the Paypal issue is a biggie, Love it or Hate it you have to take Paypal to get more bids......the "Money Order Only " is going to turn a lot of people away ( unless they know you )
You need to make your shipping costs easier to see. The other seller its right there, $10.90 , and they include Insurance ( on a $300 item thats $4.60 ) On your auction its not very clear if you even offer insurance. Make it EASY for the buyer to know what there getting into when they bid on your item......Scott