Your offer is hilarious for all of the wrong reasons.
First of all, that is not an SE/30, it is a regular SE with a Superdrive, or more commonly known as the FDHD. You'd know this if you looked up the model number on the back M5011. Second, no sane person is going to pay $550 for an absolutely filthy disgusting machine, it has filth all over it. We don't want your roach eggs, skin flakes and coke splatter. Thirdly, you didn't post ANY internal pictures of the machine, which is extremely important to know because of potential battery bomb on the logic board and leaking capacitors on the analog board and power supply.
To put it into perspective how ridiculous your offer is, I paid $60 for a SE FDHD in far better condition just a couple of years ago, and SE mystery meat like yours in the same condition on Ebay goes in the 100-250 range. And I still wouldn't pay that because you can spend that much or more repairing the machine after you buy it.
I like your hilariously inaccurate information on your page "6800 with 1 GB of RAM" You mean 68030? The 6800 is an 8 bit CPU from the 1970s, the SE/30 has a 68030. The SE FDHD has a 68000, which is what your machine is. But neither machine can accept anywhere near 1 GB of RAM. The SE FDHD tops out at 4 MB and the SE/30 at 128 MB.