986 reconsidered 2003 "S"

[mfm22]

Looking back on the last ppi done on 2003 S
The overall basic inspection revealed
bad alternator , cyl misfire, oil low , needs tune up
On the positive side tires were good but from 09 , brakes had half wear

Made a mistake and told them to stop before they checked catalytic 's ( I think there may be issue due to sounds heard while driving )
Dealer had problem getting car driving battery was dead due to bad alternator

They didn't get to "read" paint or run codes It would be another $250 and I was pissed at prices they gave me for alternator & tube up ($$$$$ crazy numbers )
The car appears to be in good overall shape body looks good usual small chips a ding or two but doesn't appear to have be resprayed any where , all stickers are there front and back wheels are in good shape 18" , interior has some wear but not abused
I feel it will clean up well

Is it worth the "risk" factor. I'm thinking Alternator, tune up , oil change at best
May need cat on one side
Miles are low at 48k asking price has been reduced from $15,000 to 11,500
And now is very firm at reduced price
Any thoughts & suggestions welcome.