To make an auction buy of LED bars in a lot, it should work out to under $50 each cost to you.... that factors in all the previously mentioned issues with secondhand LED bars. Some are worth more than others. For example liberties and freedoms are easy to swap modules on, but some bars are not. I can't see all the bars in the pile, but I don't see anything that makes cartoon dollar signs in my eyes. Maybe 12 LED bars galaxies maybe... an edge and an arrow is what I see on a quick glance. The LED bars look like the modules will be hard to swap. From that pic I'd stay under $500 for the lightbars.... truthfully my target price would be under $250...
The brush truck skid will depend heavily on the condition and type of pump. The lightbar on it is an XL.. so $25-75. The pump is key though...
The extrication tools aren't worth the hernia. Most depts buy direct from the dealer or their reps and most cities mandate new or re-certified equipment. You'd have to have the jaws all re-certified, which is not worth it. Unless you are an expert in rescue tools they are worth very little. If you were a fire equipment dealer maybe...
The things to buy in lots at auctions are easy to part out or customize lightbars like freedoms, liberties, some solaris stuff, 2100s etc. A loaded freedom can have 14 400 series LEDs that you can resell on ebay for $35 each. A savvy bar hacker can make enough parting out an older freedom to almost buy a new one.
Halogen and strobe lightbars are only worth buying in a lot if they are collectable. CA style, oscillating, NFPA models, agency specific bars etc....
I don't see any pictured, but radios are a flat out do not touch unless you are an expert. The difference between a $5000 radio and a paperweight can be 1 digit in a model number.