Hikarus have no security boards. All the security is on the COM chip on the rom board (and some boards have different things on the rom boards that act as security). The two other boards on a Hikaru are a sound board and a COM board.
Hikaru is a different beast when compared to other sega boards as the most valuable part on the Hikaru is the Hikaru itself (not the rom board). If it's not working, then the entire board set has lost 90% of it's value. This is because they are fragile as hell and die very easily, with no one currently capable of repairing it. (Ken doesn't repair the boards themselves anymore). Anyway.... to put it simply
Nascar rom boards - worthless ($10 or so, basically the price of parts on it)
Air Trix rom board - worthless (same as Nascar)
Brave Fire Fighters - I see you have it on the proto board (it's not a proto, they just put the final code on the proto boards), but they are very unreliable. They weren't supposed to go out to commercial locations, but Sega ran low on the boards, so the sales people put the code on the proto boards and sent them out despite the tech people at Sega saying it was stupid. Ken has 10 of them or so in his workshop and none of them work as the flash roms go bad. $50-$75 if it works, $0 if non working as there's no way to fix it currently.
Virtual on: Force $100-$200. This is from the price on broken Hikarus on YAJ with the rom board (broken meaning not repairable, IE the BGA fell off). This was a JP release only, never released outside of JP.
If these included the Hikaru itself and it was working, then you add $300-$400 for each.
Little more info: The most valuable Hikaru board sets are Planet Harriers and Virtual On. Others are more or less worthless as they either can't be played without special hardware or are just terrible games.
For more reference, here's how most hikarus end up on Ebay/YAJ:
Notice the missing BGA in the top left. That means it fell off and is just a brick now.