Probably more important is the specific frequencies.
Since the ATS-2500's were not sold in the USA, and most of us are located there, we may not know all the details about what is legal/required in your country. As said above, the ATS-2500 did SmartNet/SmartZone trunking. There's a lot of radios on the used market that will do that, but you'd need to know if they were legal to use in your country.
Many years ago I ran a SmartNet trunked system, and we used a lot of MTS-2000's, XTS-2500's and some EF-Johnson 5100's.
If you want new, the APX line might be your best option. Kenwood/EF-Johnson still make some SmartNet/SmartZone capable radios on their EF Johnson product line.