Can you get 452 new anymore? I thought they stopped building them.
Keep a close eye on Whittaker's facebook page. They have had CZ build them NEW 452s. I bought a 2015 production 452 American in August. Whittaker's buys about 1000 a year, and they are delivered in batches of 250-350 three or four times a year (at least, that's been the case for the last couple of years.)
The new 452s sell out very fast, they sold 300+ in about THREE DAYS last summer. I missed one from that batch, but I was able to get one in the next batch.
Keep a sharp eye on that Facebook page, if you want a 452, they can be had, new, for under $400. I paid $369 or $379 for mine in August.