a few instruments for sale

Hello!
I am a newbie to the Bluegrass festival and I have a question. I am in the process of relocating back to Florida from Oregon by way of Telluride and I will have a few instruments with me that someone at the festival might be interested in buying. I am certainly not a vendor, but these are some classic instruments; notably a 1926 Robert Johnson Loar type Gibson L1 in need of a little work, a 1936 Gibson L7 that has been restored and is playable and a 1937 Gibson EH-150 amplifier. Is there any kind of protocol for being able to let people know that you have these instruments for sale? Is that permissible or frowned upon?

Thanks so much. Text or call me at (850) 324-1928 if you have any ideas.

Margaret Warren