Hi ftw414,
But was wondering if I could use a Serial PC Mouse on the A500 
Yes you can. There are several doc and txt files, some with pics, on AmiNet that explain how to convert a PC serial mouse to work on the Amiga computers. You can usually find used serial mice at Goodwill for about $1.99. Make sure that you get one with a "thru-Hole" circuit board and not a "SMT" circuit board. A Microsoft mouse is a much nicer and higher quality mouse then Commodore's mice and should give you at least 5 years of trouble-free, good service. :-D
