Separate or mixed lot on eBay?

I hope this is the right forum for this question.

I have been looking over my equipment and I'm seriously thinking of selling it all and starting over with one camera, maybe something from the Olympus PEN series. I'm just a hobbyist, and I want one camera/lens for general purpose use. I'm considering listing on eBay, as I've used it many times before and have 100% positive feedback. My question is, am I better off splitting this up into 4 auctions, or doing one large mixed lot? Thoughts on about how much you think I can get for this equipment? All are used but gently, all have cases, manuals, cables, etc.

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Nikon D40
Quantatray (Sigma) 18mm-200mm 6.3 (w/UV filter) w/case
Nikkor 35mm 1.8 (w/UV filter)
Opteka grip with 2 batteries
Nikon SB-400 flash with STO-FEN and case
Promaster 7500 EDF flash
Carrying Case
Full-size tripod
Kingston 4 GB SDHC
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Canon A580- flash does NOT work
Carrying case
Mini Tripod
Sandisk 2 GB SD
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Fuji S1000 FD
Carrying case
Mini Tripod
Sandisk 2 GB SD
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JVC GR-DA30U (Camcorder)
Carrying case
Mini Tripod
(2) Mini-DV tapes (blank)
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~700 on the first, maybe $50 on the second with a broken flash, ~$120 on third, no clue on the fourth, maybe $200....

Those are my guesses anyway,

Ok, so about $1000 or so total. Probably a good estimate. Do you think I'd need to do 4 auctions or better to try for one mixed lot? Thanks!

Definitely not all together, but seperated in the 4 groups you've done. I might seperate out some of the Nikon gear, that might increase your bidding by $100 or so.

Nikon D40
Quantatray (Sigma) 18mm-200mm 6.3 (w/UV filter) w/case
Opteka grip with 2 batteries
Carrying Case
Full-size tripod
Kingston 4 GB SDHC
------------------------------
Nikkor 35mm 1.8 (w/UV filter)
------------------------------------
Nikon SB-400 flash with STO-FEN and case
Promaster 7500 EDF flash

The 18-200 is more marketable as a kit lens, and the 35 has a more uniquely pursued value.

Thank you so much- I appreciate it!

Generally speaking, you will get more selling the items individually.

Thanks all!