TK-880 as a scanner
My $0.02 worth:
Yes, while a TK-880 mobile is a great radio, it really isn't great as a scanner.
1) if you want to change anything about how it scans, you'll have to read & reprogram it; kinda a PITA in my opinion. To me, that's one of the advantages of a plain scanner - being able to change from the front panel, in a (almost) intiuitive manner.
2) it's a waste of a radio that has a good transmitter,
3) it's UHF only, which if you have any agencies that are VHF Hi or Low, you're out of luck.
for your 150 bucks, plus the cost of acquiring the cable & correct Kenwood program, you should be able to get a really good scanner. I'm not a guru on scanner features, but htere might be one or two people here who are.
Chuk