Astra did indeed have a modern line. A modern 9mm para Astra could be an A-70, A-75, A-80, A-90, or A-100. I'd guess what you are looking at is an A-75.
Astra is indeed out of business now, so parts will be very difficult to find, but you probably won't need them. They are not just not being imported, but completely gone as a firearms manufacturer. If you don't need the "absolute best", then it will do! But, if you want a cheap pistol, look to the Makarov. I think that the price is too high. It's used, or has been in the inventory for a long time.
I was way into Spanish stuff once upon a time. I collected Astra's older pistols, and bought Star's newer stuff. I don't have any modern Astras, but I have indeed handled them. My experience with modern Astra's is that they are reliable and tough, but accuracy will be hampered by a tougher than normal trigger pull. Personally, I think that Astra kicked ass in the past, but its modern stuff is just good in a sea of excellent pistols. As far as modern pistols go, I think that their Spanish competitor, STAR, makes a better pistol. My favorite it the MEGASTAR. Queer name, great big pistol.
There were two older 9mm para chambered Astras. There were the M600 and the M800. The M800 "Condor" is very rare, and is essentially the M600 with an external hammer.
The 400 was chambered for the 9mm Largo cartridge. This is a 9*21 cartridge where as the 9mm para cartridge is 9*19. The Largo cartridge was the Spanish pistol and subgun cartridge for decades before the 9mm para displaced it. Due to the design of the 400, it is possible that it can fire 9mm para or .380. Some have even fired .38 super through them. I don't recommend shooting anything other than 9*21 Largo. You can fire the 9*21 Bergmann Bayard round through it (the 400), but it differs from Largo in name only. The Spanish just renamed that cartridge "Largo".
FYI 9mm Corto means 9mm short, which is 9*17. We call it .380!