most economic access point g with interchangeable antenas ?

Hello,

I would like to by an access point 802.11g type at 54-Mbps but I would
like it to have interchangeble antenas.

3com model 8250 costs around 740 US$ I would like to spend much less
than that, the fixed antenna version of the 3com access point model
3CRWE454G72 costs 130 US$, are there any good access point available
with interchangeble antennas that cost at most 300 US$ ?


Thanks,

Mario