[tptacek]

I could be wrong, and if I am I'd appreciate informed corrections, but I don't think it's the norm for low-8-figure transactions to use bankers.

[vostok]

Business brokers also exist and they're very similar to investment bankers for small, simple transactions.

[davenbuster]

I've been involved in a few deals of that size (acquiree and acquirer) and to my knowledge, no acquirer ever had an IB. If funded, acquiree could lean on angel or VC who's seen a lot of deals.