I own and highly value an early "Farmingdale" R9. It has been my EDC since May 2004 and has shown no vices. However, there have been some upgrades in the R9 based on experience over the years -- thickening of an area in the rear of the slide, strengthening of the barrel-pin locking mechanism, closing of both ends of the main recoil spring, etc. When it was first introduced in 2004, the R9 was, in my opinion, the finest pocket pistol ever designed. With its upgrades, it remains so in my opinion.
Therefore, while I fully expect to carry my "Farmingdale" with me to Valhalla, if I were buying one of the R9s today I would opt for a new one. And you can count on the Brothers R to continue producing the finest pocket pistols on this third rock from the sun.