The snare is the tough part. I've had 12 Oyster Black Jazz Fests, and they sell for BIG money. Out of all of those snares, I've only had ONE "totally correct" Ringo snare, which is a '63 with the strainer one panel away from the badge. Besides Ringo's, it's one of only two that I know of. They are just impossible to find. A collector from Japan actually flew here to buy it in person. http://www.classicvintagedrums.com/index.php?main_page=product_info&cPath=93&products_id=718
The other drums can certainly be found. If you're willing to deal with single drums, the market for them has dropped dramatically. An Oyster Black 16x16 recently sold for $380 on ebay: LINK. These used to be $1000 drums all day long. The downside to singles is trying to match fade, year, and condition. Also, for some reason single rail Oyster Black 20" and 22" bass drums almost NEVER come around for sale, but the toms seem to be everywhere.
Actual 3 piece kits that are factory matched and in near mint condition, in the correct Ringo configuration, sell for big dollars, such as the 22-13-16 just was just bid up to $4900: LINK. 3 piece kits with a few issues, like fade, extra holes, or splits in the wrap, sell for between $1500 and $3000.
As for the Rogers mount, don't forget that not all of Ringo's kits had one...he used the stock Ludwig mount for some of the kits. If you drill for a Rogers mount, even though it's what can be seen on some of Ringo's kits, it will greatly reduce the value of your set.
Thanks,
Bill