I have a 2010 2305 that I am want to sell as well. I'm in the market for a little bigger tractor. So here is what I have found so far.
I found that the average asking price for a 2305 is around $9,000 to $9,500. (tractor only). A buyer of used equipment will be paying interest. Borrowing $9,000 at 6% puts the payments equal to a new 1 series at 0%. Therefor I listed my tractor at $8,200 to start with.
A tractor without attachments (like mine) I think are a bit harder sell that one with attachements.
I would suggest listing it with all of the attachments and give the buyer the option to not buy some of the attachments. I would work up a total cost for everything and post it that way. I would then figure a deduct for each of the attachments that I could offer when the questions come in. I wouldn't necessarly post the deduct prices, I'd just list the option to deduct an implement if the buyer didn't want it. I wouldn't sell an implement until the tractor sold. You may get offers, but I would tell the prospective buyer that the tractor buyer has 1st preference and you'll get back with them if the tractor buyer doesn't want the implement.
If you are in snow country, the blower won't be a hard sell. I had one when we lived in Montana and when we moved it sold in about a week.
The loader and backhoe shouldn't be either. For example, I've been looking for a used 200CX loader and haven't found one yet. A new loader is about $3,100.
A new 62C mower deck is $2,000. I have only found one used one and it was priced at $1,500. I have found two used 54 inch decks, both price around $900 and they were not 100% condition.
Weights are like gold. Steel doesn't depreciate. Those should be priced pretty close to new.
I would imagine that the pallet forks will be pretty popular as well.
As for pricing your package. Look at what the dealers are pricing new similar equipment. Look at the competition as well (orange). Unless the buyer is die-hard JD green, they are going to compare your stuff to what they can get from Kubota as well.
Take what you find new equipment to cost, subtract depreciation and account for no warranty. What would you as a buyer want to pay? Now that you have that number, figure your buyer will have to borrow money with interest. Your final price (with interest) will have to be around what you find the equipment is worth used.
Good luck.