I do this as a hobby. Recently sales have really been leaning more and more towards parts for track sets so you will see many of those listed. I buy them second hand and I am always acquiring new parts to recycle them and save them from the trash. If you are looking for a part, I might have it but not listed yet. Feel free to ask for parts not listed and I will keep my eyes open for them. Shipping rates are always going up and I don't set them, rates shown on listings are estimates based on the expected weight of the package. I combine shipping by weight and if you request a quote using the eBay cart you will get a more accurate rate. I DO NOT always get to pack and ship same day, so if you need it rushed, I might not be the store for you. I put a 4 day handling time for a reason. Again, its a hobby for me and I work full time and have kids to wrangle as well, so shipping is done 2 times a week usually.