Wireless adapter

Went to Jurong Point with XT to check out the prices of a Linksys wireless adapter (not PCI adapter hor). All thanks to my mother. She flung open my window and the wireless adapter thats taped on my window ledge dislodged and flew down 27 storeys. It still works, though the receiving isn't all that good without an antennae.

Only PCI network cards in PK com and Cyberactive but lucked out at Harvey Norman. There wasnt any stock the last time we went there before the exams. Bloddy $79 for one crap wireless adapter! Sian. Anyone knows whether the signal receiving parameters are stronger for PCI cards or external adapters??