The 2950 is the model that (I believe) Willson uses to attract players who like a large sound (as opposed to the more compact sound of the 2900). It has a large shank receiver and a larger bell than the 2900, and it has a very smooth, even response and tone. This particular horn looks very good (the seller calls it "pristine"). It comes with the Willson hard case, which has a ton of room for accessories and sheet music. Buy-it-now price is $5,000, which is a really good price for this horn in this condition. Shipping only adds about $58. And there IS a make-offer button.
ITEM SOLD - SALE PRICE NOT CLEAR
https://www.ebay.com/itm/193468311335?ul_noapp=true&autorefresh=true