I responded to the post but by direct email and told him more information was needed to fully answer the question......I have not heard from the original poster.
Hello Gregg. The 0566# on your engine tells me it is a Lionel HO gauge train. The condition, and car #'s are essential. The car #'s are on the sides of your cars, or some cars have no numbers, so the type of car is needed info.
I'll give you $25.00 sight unseen; but would need the above info to go higher.