ACDX Rob has it right. Hartland Hobby Wholesale is a distributor of model train products.
And it wasn't excess K-Line inventory but rather RMT products, though they were made from K-Line tooling. If you look at the OLR rebranded products, in particular the rolling stock and locomotives (K-Line never made a short F-3 or short GP diesel), you'll realize the paint schemes had been cataloged by RMT and not cataloged by K-Line, save for an exception or two, like the Penn Central Flexi-Flow hopper (which RMT changed the road number on). Obviously the track is exactly the same.
After the K-Line bankruptcy and the $3.8 million dollar debt K-Line left Sanda Kan holding, the rules changed where all products had to be paid for in full before shipping to the US. Actually before the end of the original K-Line company, K-Line could no longer get new products shipped to them without them being paid in full. Which is why some of the last cataloged K-Line products are the hardest to find: The ones actually made were made in very small quantities.
For clarification to those who don't know, Sanda Kan was at one time the largest single factory complex in China where nearly all the model trains sold by anyone were made, save for very high end models made in South Korea. Sanda Kan was eventually sold to Kader Industries who owns Bachmann. Some years ago, Kader dropped some 60 model train companies as customers, who were left scrambling to find new manufacturing vendors. A small handful remained with Kader including Aristo Craft Now out of business), which at that time, RMT was affiliated with, so Kader continued to manufacture the RMT products, most of which had previously been K-Line products, or made from K-Line products (The BEEF F-3 engine and short passenger cars were not from new tooling, but from the K-Line molds and then the shells were physically cut shorter).
I don't wish to knock RMT, but obviously they had products made that they were unable to pay for, just incase any one thinks starting a model train company and having products made for you isn't all that difficult. You need to have products to sell in order to make money. And those products need to sell in a timely fashion, not sitting in inventory somewhere. For the 60 some companies dropped by Kader, this was a hard learned lesson, which they probably already knew.