Jegs, Summit, or Local Parts Store?

I need to gather parts to finish putting together an engine (cam, timing, rockers, gaskets, etc), clutch (everything), and other parts (tranny seals/gaskets, etc).

It would be nice to get everything in on place, to save time, shipping, and bs.

Let's look at a n Engine Kit Gasket Set.

Jegs
Fel Pro KS2110 for $55.99, does not include intake gaskets and valley pan, which is separate; Fel Pro #375-1214 for $24.99.

With shipping a total of $93.97.

Summit

Fel-Pro QFS7891PT - Fel-Pro Gasket Kit Sets for $117.99, and it states it comes with the intake manifold gaskets, but not the valley pan; Fel-Pro QMS96007 - Fel-Pro Valley Pan Gaskets for $17.95.

With shipping a total of $147.89.

Advanced Auto (aka local parts store)
$49.99 for the gasket set, not sure it they include the $10 for 'shipping' plus the intake and valley pan set for $24.99, which I have bought before and there was no 'shipping' charge. I am looking on-line, and I am not sure what the deal is with shipping to your address or to the store, the website is not clear- worst case scenario:

With shipping a total of $84.98.

NAPA was in line with Summit.


$10 difference between the local parts store and Jegs, $60 between the local parts store and Summit, and $50 between Jegs and Summit/NAPA.

I can justify the extra $$ and get everything from Jegs, (or close to everything), because when I added $200 more to the cart the shipping increased by exactly $1 and I would not have to order/pick-up.
I added $200 more to the Summit cart and the shipping increased by exactly $1 as well.


Same Felpro parts, so why such a huge difference in pricing?

Where do you guys buy parts, (in bulk)?