Ouch.... $200 was a tad high for a tiller, I bought one for $180, another for $270.... but they both came with tractors
Openside/Closedside are for the most part identical tractors, and yes you can add the rear pto... if you can find or build the parts
I missed a 'deal' on a closed side LGT 145 with a low hour tiller. Had a new battery, rebuilt carb and all sheet metal looked nice. Rear ag tires and it had all of the top shaft brackets for the 3pt but no lower arms and the pto. It was 4.5 hrs sw of me in KY. Emailed seller etc and was deliberating making a deal at this distance. Decided to email to buy it and seller emailed said he sold it for $850 which is what I was willing to give. At least it saved me a trip even as seller offered to meet a portion of the way. It was on CL for about 10 days at a $950 asking price. Using SearchTempest to find ads on through CL it appears many of the ads don't last more than a few days to a couple of weeks. Some longer but price is usually out of line. Most are in teh $300 -1000 range. My grandson and I have been running my two OS 145's for the first time to mow yard and horse pasture the last couple of weeks. They mow nice and level. Am really impressed. Just have to get the steering tightened up. Do wish they put the brake on the left though. Two of my five are 1976 models and they are smoother than the ones with the welded crankcases. Just thought I'd throw this out there. Thanks.