I have a 1988 YJ. I got a quote of $900.00 for parts and labor ( new pressure plate, clutch disk, slave cylinder, pilot bearing) from one shop. Another shop qouted me a labor only rate of $600.00 if I provided all of the parts.
Preen is a pre-emergent weed prevention product. It prevents weed seeds from germinating instead of killing existing mature weeds. Preen works on a wide variety of annual weeds, but it won't have an effect on perennial weeds because they already have established roots.
1 This form of preening can mean both that he's nervous and that he's trying to look his best for you.  He offers you his hand palm-up. If you're at the hand-holding stage, pay attention to the way he offers you his hand. If his palm is facing up, he's hoping to connect on more than just a physical level.