Well if I were you I would first see if the rest of the guitar is worth buying. If you like it then proceed with caution. The pickups can always be changed.
Alinco means the type of material the magnets are made out of (Aluminium, Nickel and cobalt) there are different variations 2,5 and maybe 8. Each variation has it's own characteristics. I'm not very knowledgeable about the distinctions but if it sounds good who cares.
Cermaic magnets are a newer technology that gives incresead pickup output. Many high output humbuckers have cermaic magnets. I use a pup with a cermaic magnet it's powerful yet articulate.
here is a seymour duncan description of the types and distinctions of pickups:
http://www.seymourduncan.com/support...k_a_pickup.pdf