We have expanded our article for individuals selling bicycles and components — which also holds advice for buyers. There is a new section about shipping. This article holds all the basic information you need on where to post an advertisement and how to create it — how to take good photos of the bicycle, and measurements so the buyer will be able to determine whether the bicycle fits.
![Measuring seat-tube length](http://cdn-0.sheldonbrown.com/blog/wp-content/uploads/2020/03/seattop-inches-450x600.jpg)
Measuring seat-tube length -top
![Measuring set tube length,starts at the center of the BB spindle](http://cdn-0.sheldonbrown.com/blog/wp-content/uploads/2020/03/seatbottom-450x600.jpg)
Measuring seat tube length starts at the center of the BB spindle