I'm new to this scanning hobby what's a good trunking scanner I can buy to scan Phoenix pd and other cities?
You seem to have posed this same question in several different threads, but I'll go ahead and give you my opinion here. I bought the Uniden BCD325P2 digital trunking scanner. It's about as low cost as you'll get, while still having digital, trunking, phase 2 capability in a handheld scanner. It's also computer programmable, as is the case [almost a requirement] with most scanners these days. You can program by hand, but I wouldn't want to spend hours doing what I can do, literally, in less than five minutes.
With that said, you're going to have to pay for what you want. You can currently get the BCD325P2 on Amazon for about $366. It's about as cheap as you'll find a radio that does everything that this one does. It'll get you the (non-encrypted) Phoenix PD channels, along with many of the surrounding cities that use the various Regional Wireless Cooperative systems, along with the county Motorola II system in use by the MCSO. You're not going to find a cheap, sub-$100 radio that will allow you to monitor the valley agencies, unless you're willing to settle for DPS and some fire dispatches.
There are other scanners out there, but this was the one that ticked all of the boxes on my wishlist and it has been a solid performer since I bought it. I'd recommend also picking up a good aftermarket dual-band antenna at some point, but you'll get by with the stock 'rubber duck' until you do. You'll also want to find a copy of FreeScan and you'll be good to go.
I hope this helps shed a little light on what you'll need to get up and running. I'd be happy to answer any other questions you have. I've used a scanner for many years as a part of my job, but the digital scanner is something I've only gotten into using over the past year or so. If there's a question I can't answer, I'm sure one of the other members can.
Good luck and happy scanning!