I've been trying to figure out how much upgrading a conventional locomotive to either ERR/TMCC or PS3 increases the value of a locomotive. For example I have an ABA set of Williams Alco PAs in Santa Fe livery that I upgraded with an ERR Cruise Commander and ERR Sound Commander with Alco PA Railsounds. Before the conversion the ABA set was probably worth about $150-200. So how much value does the command upgrade add to the set? I'm not looking to sell the set any time soon but if I ever wanted to sell the ABA set to fund a different locomotive purchase how much should I ask over the cost of a stock set? $50 more, $100 more? I've tried looking up sold auctions but I've only found stock sets. I'm just curious what kind of "value" is added to a conventional locomotive after it's been upgraded to command control.
Original Post