Various chainrings and cassettes for sale:
Shimano Ultegra 10spd 15-25 Cassettes x 2. Great for junior gearing. Both have had very little use and are in near new condition. Used as a temporary solution - $50 each
Shimano Ultegra 11spd 50/34t chainrings. Both are brand new and have been removed from a bike before use.
50t - $145
34t - $25