You need to find out exactly what they are expecting you to do. An ISM role varies greatly depending on the dealer your working for. You should find out if they have an established Internet department already. Is there an Internet Director? Are there other Internet Managers currently working there? Do they want you to strictly work Internet leads and sell cars, or are they wanting you to sell cars as well as manage the website, crm, website inventory, and all the vendors that will be constantly on your back if you are the go to go for the Internet department. If you've never done this before I would assume they are offering you an Internet Sales job, and not an Internet Director / Manager position. However, this is what you need to find out, and if they dont already have an established department you should ask for a base salary since it will take a while to get everything up to par.