If it has brass rail, throw it away.
If it has horn and hook throw it away or install Kadee couplers.
On second thought… dont throw it away, use it to practice the nice weathering techniques possible today with the powders, paints, fluids etc.
If it has plastic wheels, retrofit with metal wheels.
Your power pack may still be good but today’s engines are mindful of power.
Read, read, and read forums of the different manufactors of engines. Blueline is not for full DCC, MRC does not do a good job with decoders, Digitrax, NCE makes good DCC systems.\
Finally dont trip over yourself to buy that 30 dollar engine on ebay that was new and retailing for 300 dollars last year. They are merely dumping these engines so to clear the way for the upcoming NEW DCC and SOUND engines soon to be released.
DCC = two wires instead of all that DC stuff. You will still need to insulate some and gaurd against reversing. But today’s gagets do all of that automatically.
Atlas, Kato, Proto are the current Locomotive kings in quality. Broadway has lost thier way but are struggling to reclaim some of thier lost glory and smaller engines like IHC soldier on with some tiny upgrades.
Some of this stuff happening today was the stuff of science fiction and fantasy 25 years ago.
Enjoy!
Oh by the way… the something you want to buy today is either back ordered for years or never to be produced again.
Example. One walthers barge kit. Retail about 50 dollars 5 years ago. Now out of production and sold on ebay for anywhere from 125 to 300 dollars cash. I know because I sold mine for 230 unbuilt. At a nice profit.
IF you see something you like at the hobby shop, BUY it RIGHT THAT DAY because it WILL NOT be there when you return to really buy it.
Finally but not least… the old venerable Blue Box kits so beloved by our Athearn is now produced in China. I have built several and they match the old USA kits in every way except for use of metal wheels and kad