Big CB amps can be expensive and high power amps made specifically for CB are junk inside. They have the least amount of stuff inside to get power out with little or no harmonic filtering, no protection circuits and the construction practices are usually a complete joke.
Instead of actual etched circuit boards they might use a dremel tool to remove a little copper here and there on a big blank circuit board stock then they just solder the parts down anywhere they feel like it. Solder flux is never removed soldering usually looks like a 5yr old did it and the wiring looks like the professors hair in "Back to the Future".
Here is an example of a made for CB amp that probably puts out well over 1,000 Watts.
https://www.ebay.com/itm/Dave-made-...668150?hash=item285dc1b6b6:g:8g4AAOSw2QJbAyuq
Or here is another beauty, looks like a Frankenstein project that went bad.
https://www.ebay.com/itm/DEI-2SC287...037066?hash=item3f9b74688a:g:V0gAAOSwPW9a6kzW
Here is another where the owner is probably too embarrased to show you under the hood because of the poor workmanship.
https://www.ebay.com/itm/1700-watt-...435114?hash=item285c6e76ea:g:bz8AAOSwkChaoLve