I am reading to find deals as I myself will copy the bargains posted and send mass emails to parents that I have addresses for about the deals, not a requirement but a nice courtesy. To the parent that wants the supply list early, you are correct if it's not given in advanced teachers shouldn't be picky on colors. What exactly is the purpose of all the color matching? If it's for organization purpose just ask parents to purchase binders/folders/spirals for each subject in coordinating colors.
It's funny when you read the various grade levels comment on the supplies desired. Elementary is long and brand detailed as to fulfill the community sharing needs as the older levels are short. I am not a fan of the community sharing as it does not teach responsibility to the kids. To the few teachers that stated if parents send the designer pencils to school they tell the parent to keep them at home. JMO but I think it's unfair to that child and parent, as many kids look forward to school shopping to pick out that favorite character pencil and folder to be told keep it at home, smh.
The list reduces later as teachers are glad to just have them in class with pencil and paper, I speak from experience. It's understood that some parents may not be able to purchase all items on the list, but let's be real ever parent can get paper and pencil. Supplies that I purchase I sell to kids using to money to purchase needed supplies for the classroom. If a child brought extra or items from my wish list I gave them bonus points, free homework pass, etc. as a gratitude but I never required some of the items asked nowadays. You might be surprised as the amount you get when incentives are given.
I guess I am rantting as to ask what is more important a particular color folder/binder/notebook or just that they have the items? I know I will get alot of slack from teachers on this subject matter but when they sat down and think about things the needy student will have school supplies just not all of the required items or brand names when school starts but will get them in two weeks. Those that you are providing them too are maybe the ones that parents always have the money ready for field trips and fun actiivities.
Sorry folks I know I went OT but had to vent...so let's get back to the bargains.
I did the same thing--sent emails to the parents I have them for. I wish I had my list now instead of in a few weeks. The only ones I have are my returning kindergartners(my class is preK and K combined)
I can only speak to the colors for one thing in my classroom and that is the take home folders. I like all my K's to have one color folder and all my pre-K's to have another color. It makes it easier when I need to send something out to just one group. Of course, I buy the folders myself, so no parents have to go looking for that certain color. Parents will try to replace their child's folder with the Scooby Doo one or whatever, but I just send those home. Yes, I am a meanie teacher.

I promise my kids get lots of special treats, but I need my consistency with the folders.
We do the community supplies thing. We are a Montessori school, so we are definitely teaching responsibility in many areas; however, there is a lot of disruption when kids have to keep going to their cubbies looking for different things. Our kids do not sit in a specific desk all day, so they can't leave the supplies there. Then there is the sharpening and the cries of "I don't have a red!" We have colored penciled holders out with multiples of the colors, as well as writing pencils, paper, erasers, etc. It works for us and I find the kids go through a lot less supplies.
I am a mean teacher that does not allow the "pretty" pencils.

They are as much of a distraction as silly bands in my classroom. Heck, I can't even put out the
black Ticeronga(sp?) pencils because the kids will fight over them. Last year, I had bought some of the pencil topper erasers to put on pencils that had no eraser. The kids even argued over who got those to do their writing. All the pencils I put out are regular, yellow pencils, and that is what I ask for on my list.
Marsha