Good heavens you should not have to pay that kind of money. There have to be a lot of old 3pt hitch configured 2 row plows around. Pretty much no demand for them anymore as farming on larger scale uses much different tillage and on a small scale they are out of business, only do it as a hobby, or don't deal in equipment any more. At some point in history there had to be more of those "3pt , 2 plow" units around than any other kind. Don't know about Texas but in the east places like WV have a statewide "Market Bulletin" where individuals advertise farm equipment, often older stuff. Tried Craig's List or similar on-line sources?