id prolly start it at 99 and sell it big styley in the writeup say its 400 odd quids worth of top grade pump, plenty bang for buck, and if yuou want the best then look no further, i use one of these all the time and it pumps like billio etc etc etc sell sell sell. make the user have it the ol sales pitch.
a low price encourages greed and people outbid each other with the want to win what ever the cost...
chuck a load of stats in there to ltr per min blar blar