You should be aware that the Heuer Bund is probably the most refurbished watch in history; a lot of them have their cases re-bead blasted, the hands and dials relumed, some with fake engravings, and often passed as "NOS". They are beautiful but do not pay a premium for them.
There is a lot of truth in that statement as, if authentic, these were all flown watches (F104 Starfighters in the late 60's and 70's) and they took a beating. Many were refurbished by the Bund and had any number of replacement dials, hands, parts and case refinishing done over the course of their service life. Some were refurbished earlier, and many later or even multiple times, which is why there are different versions of the 3H dial styles, Heuer symbols, no 3H dials - both in tritium (small "T", like mine below) and and even later without - all of that was prior to Sinn taking over the design and servicing!
I posted mine in other places here today, so here it is again:
You can find a good to great example without over extending if you are patient and keep doing some research. Given the fact that these are bead blasted, I think you can get a sense of how much refurbishment has been done based on how clean the case lines are and if you can see the reference number (between the bottom lugs - pic below) or the watch number (between the top lugs).
Blurry, but you get the gist...
My Bund was purchased from an established and current OF member, who in turn acquired it from a well-known seller on the Military Watch Resource forum and it has been in my possession since 2017.
No to disparage the seller or buyer of that example, but I think the OP made a good call to pass on this one, at that price. That example sold for just bit below where I think the market is for a good, non-3H dial issued Bund, the most recent I saw sold on MWR for ~3600€. I believe the dial on the eBay watch to be a very late non-tritium replacement...I have no real comments on the other photos, but that case has been refinished by a (very) heavy hand IMHO.
There are some very reliable sellers and collectors on the Military Watch Resource forum, and good examples will occasionally pop up here too. Sadly, my example has not been getting the wrist time it deserves, so while I have not determined if I will list it (here) for sale yet, you are welcome to DM me and strike up a discussion.