I had an Octane shipped in some kind of instapack type material and it arrived in perfect condition. I believe it was the eBay seller "TryC2" ... I've had other machines shipped by them and always the same - they are packed quite well and arrive in perfect condition. Sometimes RAM comes loose and rattles around, so I recommend removing and packing separately any internal components that won't handle being tossed around.
Indy - (indy) - R4600 - 133MHZ - 128MB RAM - 6.5.22
Indy - (mimsy) - R4600 - 133MHZ - 160MB RAM - 6.5.22
Challenge S (WIP)
Indigo2 - (indigo2) - R4400 - 200MHZ - 128MB RAM - 6.5.22
Octane - (octane) - R12K - 2X300MHZ - 640MB RAM - EMXI+4TRAMs - 6.5.30
Octane - (petrol) - R12K - 1X300MHZ - 1.5GB RAM - 6.5.30
O2 - (manxome) - R12K - 270MHZ - 256MB RAM - 6.5.30
SPARCstation 4 - (sparcstep) - MicroSparc - 85MHZ - 32MB RAM - NeXTSTEP 3.3
SPARCstation 5 - (sparc5) - MicroSparc - 85MHZ - 128MB RAM - Solaris 8
SPARCstation 20 - (sparc20) - HyperSparc - 2X125MHZ+1X160MHZ - 512MB RAM - Solaris 9
Sun Ultra 5 - (ultrasol) - UltraSparc - 333MHZ - 128MB RAM - Solaris 8
NeXTStation Turbo Color - (blackhole) - m68040 - 33MHZ - 80MB RAM - NEXTSTEP 3.3
Indy - (mimsy) - R4600 - 133MHZ - 160MB RAM - 6.5.22
Challenge S (WIP)
Indigo2 - (indigo2) - R4400 - 200MHZ - 128MB RAM - 6.5.22
Octane - (octane) - R12K - 2X300MHZ - 640MB RAM - EMXI+4TRAMs - 6.5.30
Octane - (petrol) - R12K - 1X300MHZ - 1.5GB RAM - 6.5.30
O2 - (manxome) - R12K - 270MHZ - 256MB RAM - 6.5.30
SPARCstation 4 - (sparcstep) - MicroSparc - 85MHZ - 32MB RAM - NeXTSTEP 3.3
SPARCstation 5 - (sparc5) - MicroSparc - 85MHZ - 128MB RAM - Solaris 8
SPARCstation 20 - (sparc20) - HyperSparc - 2X125MHZ+1X160MHZ - 512MB RAM - Solaris 9
Sun Ultra 5 - (ultrasol) - UltraSparc - 333MHZ - 128MB RAM - Solaris 8
NeXTStation Turbo Color - (blackhole) - m68040 - 33MHZ - 80MB RAM - NEXTSTEP 3.3