Prepping for a Yardsale

The time has come for me to start getting very serious about having this yard sale. School starts up in about 2 weeks. I'd kind of like to have the sale before then, but it's warm enough here for me to do it well into September. Initially I wanted to do it while my folks were in town visiting, but I didn't want them to feel like they had to do the work. My mom did give me some ideas about pricing and offered her opinion on what was worth keeping and what was worth getting rid of. My biggest issue is that I have a couch and loveseat that are structurally perfect, but the leather is cracked and peeled on the arms and the seat of the sofa has a hole. I figured I'd have to toss them, but Mom says to stick them out there and sell them as is. The hubs also thinks I should try and sell one of the kids bikes, which is a bit rusted and has a broken chain. I know that there are plenty of crafty types out there, but I feel weird having so much "fixer upper" stuff. I gave the kids the opportunity to go through their stuff and sort out what would be worth selling for them. Not surprisingly, they had a very difficult time with this. Everything was something they swore they'd be using soon, even after not using some of it for years. Some of it was emotional (trying to keep things they've had for years, but offering to sell things that were nearly brand new that they'd been desperate to have) and some of it was just pack rattish in nature. I feel their pain. Knowing that we're sizing down is hard. We're not just going to a smaller house, we're going from a house to an apartment. No more extra bedroom, no more back yard, no more garage. This is a huge amount of space to lose. I'm guessing we'll be renting a small storage unit for those few things we're totally unwilling to part with (in the hopes of having space for them in the future), boxing bag, chest freezer, trampoline, folding table. Holiday items are also giving me a little trouble. How much to I keep, just enough to add a few touches, I suppose. Do people buy holiday items in August...from yard sales? I would if I had the extra dough, I guess, but I wonder if anyone else does. So, I'm open to any and all suggestions here, how to do this yard sale thing right. Pricing, haggling, how long to stay out, is it okay to broken things out? I need to get rid of lots of stuff, is it tacky to put out things I think are trash (open rolls or wrapping paper, etc)...so much to consider.