HI Sideshow,
If you look in my photo albums I just posted a spec sheet for the R-21EC, I believe it is for 2014, but there didn't seem to be many changes over the years. The R-21ECs are certainly a bit different than the original R-21, but I don't have a spec sheet for the original. Someone at the factory could probably dig one up if you needed it. Also, if you go to the Ranger Tugs site and scroll all the way to the bottom there should be a link for past models where you might find a different spec sheet. Overall there seems to have been two models, the Luxury and the Northwest Editions, pretty similar. As far as options I think the major ones are 12V air conditioning, downrigger plugs and pads, bimini and carpet and trailer. Some common after market additions to the R-21s that may affect price are radar, auto-pilot and cockpit enclosures. The other difference is the motor, it seems most years had Yanmar 30HPs and a few years had the Volvo-Penta 30 HP. I'm not sure why or what years and don't know if it affects price. I have the Volvo-Penta and like it, but those little three cylinders vibrate pretty good at idle..just something to be aware of. Also, keep in mind cruising speed on the R21s is about 6.5 knots and hull speed seems to be about 8ish knots. Cruising speed will give you about .6-.7 gallons/hour while WOT is about 1.3 gallons/hour, double the fuel for about one more knot. The pricing on these seems to be all over the place, when I bought my 2015 last year they ranged from $35K to $60k. It seems that the fresh water boats are more expensive and the overall condition of the boats dictate price. I have seen a number of these tugs that were not well cared for and it showed. However, I have also seen a lot of them in pristine condition and they are a thing of beauty. My 2015 never saw salt water before I bought her, was always stored indoors had 16 hours on the Volvo-Penta (recall) and 35 hours on the boat. She is in showroom shape. If I can answer any questions abut my experience feel free to PM me. Good luck on your boat search. -Sheepdog