So far, most of the Simi PD transmissions are in the clear, but many are encrypted. There is still a lot to listen to, though. Ventura CoFd, which you can hear on your analog scanner and Ventura CoSD, LAFD, LACoFD also. For digital, in addition to Simi PD, LAPD and the ICIS system (Burbank PD, Glendale PD, Verdugo Fire, etc). L.A. County is developing a P25 system (LARICS), which should be online by 2020 or so. This will have LACoFD and LASD, and lots more, though LASD may become encrypted.
Most of us in the hobby, unfortunately, agree that most PD will be encrypted within the next few years. My hope, unlikely as it may be, is that PD dispatch will remain in the clear with TACs and SWAT ops encrypted. LAPD so far seems to have no plans to go encrypted, but that may be up to the new chief.
All that said, in terms of buying a new scanner, that depends on what you want to listen to. SIMI PD is mainly in the clear if that is your priority. Check out the Whistler and Uniden forums on here for some newer models. You can also find some good, used digital radios that may tide you over until the new Ventura Co system comes online. I wouldn't spend too much, but at least that would give you Simi PD and LAPD. Check Craig's List and eBay for that.