HO locomotives can be tricky to find cheap so I was surprised to find this Walther's GP15 for $65. I got one of their engines in 2006 (A ViaRail F40) It's never given me trouble so I was curious to see the quality of this model. It's not high-end but is still seems decent for the price.

If you want to get one for yourself:
https://amzn.to/2UUvjTt Canada (Affiliate)
https://amzn.to/3iVuVft USA (Affiliate)