I couldn't find any on the KK site?
the $130 one is from Mash Master
Click on the price list at the top of the page. Page 18 of 40. Chillout mkIII 30 plate $119.95.
I have one of the duda diesel 'style of jobbies' like on eBay and having seen one of the above style in real life, I'd go the mk111 (which seems the same as the mashmaster chillout mkIII). They just look to be a better quality item and are certainly much larger (potentially better at doing what you want it to do).
Likewise I have heard folks say that 20 plate jobbies don't cut the mustard either.
You may prefer 1/2" NPT fittings on the chiller to attach a thermo, you could still do it even with barbed fittings (as per mkIII). Barbs are not so bad, the are possibly easier to clean. There are pros and cons either way in the NPT vs barbs debate.
You'd be happy at $80 perhaps? Spend the extra $40 and get a decent one. Even on eBay I can't see a 30 plate chiller for much less than $100 delivered (and they may be smaller and thus not as effective).
Or hang in there for a 2nd hand one as per your OP, just don't be in a rush.
You may just get a cheaper one from someone upgrading, which you would probably do too at some stage...