Each of the olympus peices seperately.

The third party lenses depending upon their quality and expected
price.  You may want to sell them seperately, or as a group
or if they won't make enough to be worth shipping, sell them
locally and make a student happy.

List copied from the orginal post and annotated:

First of all, change warranty to warranty card. The warranty has long
since expired.

I picked the groups becase the person buying the items will probably
want the extras and no one will pay to ship them from Israel.

Sell as groups:

Group 1:
    * 1x Olympus om-2 spot program with original box, manuals, warranty.
    * 1x Olympus eyecap 1 with original box.

Estimated price $250-$500, plus $100 for shipping. Due to rarity, send
via courier service (FedEX/UPS/DHL).

Group 2:
    * 1x Zuiko auto-s 50mm F1.8 with original box, manuals, warranty.
    * 49mm adapter/stepping ring ser vii
    * 49mm cozo a-1 filter (came with the zuiko 50mm)
    * 49mm filter for the 50mm zuiko lens
    * 49mm rubber lens hoods

Estimated price $50, can't guess shipping.
Due to rarity, send via courier service (FedEX/UPS/DHL).

Group 3:
    * 1x tokina sd 70-210 4-5.6
    * 52mm adapter/stepping ring ser vii
    * 52 key uv filter (came with the tokina)
    * 52mm rubber lens hoods

Sell it in Israel for 100 NIS and 12 NIS shipping via
the post office special delivery.
You might get more outside of Israel, but no one is going
to pay insured air delivery for it.

Sell as seperate items:

* 1x Olympus electronic flash t20 with original box, manuals, warranty.
Estimated price $50, can't guess shipping.
Due to rarity, send via courier service (FedEX/UPS/DHL).

* 1x Olympus DX w zuiko lens 38mm 1:2.8 (snapshot)
I can't find any information on this, what is it?

* 1x Olympus compartment case-s with manual. Itâ<80><99>s a hard brown leather
case for one slr camera and telephoto 2 lenses.
No idea of price.

I don't know what the following fits:
    * 58mm adapter/stepping ring ser vii
Give it away?

You would make a lot more money IMHO if you can find someone to carry
them to the U.S. in their luggage and ship them from there. Since most
of the items are impossible to find in NEW condition, people may be
interested, but if they have to pay to ship them from Israel and make
sure they actually get there and are undamaged, you will have to use a
courier service. I would not trust them to the Israeli Post Office.

That's the problem with the Tokina lens. It's not rare
and it's not special. I can get a "like new" one from
KEH complete with shipping for about $50.

Since the shipping is so expensive, you might want to offer it as a
package on eBay with an opening bid of $1000 and a buy it now of $1500.
You might just get lucky. You probably will have to relist it at a lower
price.

Geoff.