Transformers Mosiac: "Groupiecons"

You could try BBTS for individual prices, then multiply the total by 30-60% depending on their condition and whether they have boxes/cards. A good total for ebay might be between $100 and $250.

Best bet is to see what figures that are similar to yours in quality are going for on E-Bay.

Also you could try ToyFare or some other toy magazine with a price guide.
Actually, I believe ToyFare did a TF spolight issue not long ago... # 122 comes to mind... I'll try to remember to find it when I get home and maybe you can get it on back-order.

OK I was close, issue 120, August 2007
And since I'm feeling nice I looked up your figures(to the best of my ability)
Keep in mind that these prices are assuming mint condition, anything less than perfect you take off probably 20%-30%... bad/worn condition probably take off 75%-85%

First price in in package, second price is loose
Beast Machines: [I'm assuming you meant BW here since there is no BM Tarantulus]
Tarantulas
Original: 30,10
Transmetal: 25,6

RID:
Optimus Prime 40,10
Obsidian 8,3
Megatron 25,7
Slapper, Gaskunk, Nightscream pack 20,5
Rapid Run 24,7
Railspike 20,4
Midnight Express 22,7

Armada:
Optimus Prime
[assuming not deluxe and not powerlinx since you said you had Sparkplug]
44,9
Jetfire 40,14

Energon:
Optimus Prime 45,11
Landmine 24,6
Treadshot 15,4
Divebomb 14,4
Kickback 12,3
Stormcloud 15,4

Cybertron:
Optimus Prime 56,14
Downshift 16,4
Ransack 16,4
Sideways 16,4

Movie:
Blackout 35,9
Bonecrusher 18,5
Protoform Optimus Prime (no price)
Spyshot 6 (no price)

Classics:
Optimus Prime 22,5

Minicons:
Sparkplug [included in Arm.OP]
Highwire (armada and energon)
[Armada, Street Action Team] 10,6
[Energon, Perceptor] 10,3
Cometor [included in Arm. Jetfire]
Inferno
[Emergency Team] 10,3
Makeshift [included in Emergency team]
Grindor (armada and energon) [included in Arm. S.A.T. and En. Perceptor]
Shureshock (armada and energon)[included in Arm. S.A.T. and En. Perceptor]
Energon starsaber 14,4
Armada Skyboom Shield
[Armada, Race Team] 12,3
FIrebot [included in Emergency team]
Prowl [uhm... way not enough info. which version from which line]

Minitransformers:
X-Brawn
[2-pack, X-Brawn v Scourge] 6,2
Optimus Prime [assuming RiD Spychanger] 10,2
Scourge [included w/ X-Brawn]

G1:
Seaspray 40,14
[if actually metallic G2 version] 18,6

hope that helps, but your still probably better off doing your own homework and checking E-Bay

weell...thanks for the help anyways...maybe i wouldnt get too much...but hey i like most of em...this would be only for case of emergency like me breking a bone or something...