small block and th350 combo

[Greasey Harley]

305 that smokes with TH350 usually $300ish
Yours looks very clean, perhaps $400.

Not meant to insult, Just not a lot of value in that combo.
This is only my opinion and based on what I would ask if I were trying to sell that package.
I recently sold a standard bore, 4 bolt main 350 long block for $250, it was ready for a rebuild and I thought I did good.

You could sell separately, the distributor, carb, intake, accessories, Exhaust manifolds, and those sweet wire holders.
...or you could horde that stuff (I would)

Your local market may be different.
Hope this helps
-Russ