Edited sentence: Online and Offline music stores become backordered for months because of the demand for the Valve Junior.The Epiphone Valve Junior has built a large fan base and become very popular because it's vintage Class A tube tone, low price, ability to be modified, and retro looks.The amp started out selling for $99.99 (Head) and $129.99 (Combo) but as the knowledge of modifying the amp spread, so did the demand, raising the cost of the amps to $129.99 (Head) and $149.99 (Combo).Valve Junior Mods