Where is the cheapest place to get ballast plates for curves in the US?

Here's a summary of the LEGO news:

The question of where to find the most affordable ballast plates for curved LEGO tracks in the US was posed by Reddit user /u/Realistic_Ice6870. The user sought advice on the best place to purchase these specific LEGO elements.

Unfortunately, the provided information does not contain any details about specific sets, prices, or retailers. Without further information, it's impossible to determine the cheapest place to acquire ballast plates for curved tracks.

For anyone looking to expand their LEGO train layouts, you might find a LEGO train track set helpful.