So my new bike had a problem. Besides the rust (it came off) and the flat tire with a presta valve (my husband replaced the tube), it had a stuck seatpost. This was something that never occurred me or my husband to check. (Note to readers: check that your seatpost is not rusted to the frame.) Apparently water can get in between the seatpost and bike frame causing it to rust together. In the case of an aluminum seat post, it can actually make a chemical weld so that the only way to get it out again is to physically cut the seatpost off and saw it out with a hacksaw.
I took my bike to a bike shop who had the opinion it wasn't worth fixing. Since the bike only cost $25, and the parts and labor would be around $70 (that assumed the post was cut out). There didn't seem to be something that could just be stuck on top of the seatpost to get a couple more inches. Then my husband took a big wrench, put it around the seatpost, laid the bike down, and pushed really hard from side to side (Note: this can warp the seatpost and or your frame). The post moved. He managed to get it out. The bike was fine. I was very happy. I scrubbed all the rust off the post, now I just need to find some grease to put inside the frame to keep it from happening again.