Around here, he is asking "full market price" for that, assuming it is in good condition with minimal tooling, up to maybe 2000 fully tooled. Worn out it might be 500 to 800 bare and 1200 tooled.
Look at it this way, if you did both halves of the transaction separately, and dickered down to 800 on both sides before closing the deal, could you still live with it, knowing you got a pretty good deal on the lathe and did not get full value out of the snowplow? If so, go ahead. If it would feel like the amount you saved did not compensate you for the value you lost on the snowplow, then either walk away or see if he will chip in a little. And by swapping straight up, you just saved a ton of time dickering. Reduced hassle on a deal has value to me, but if you like dickering it might not be worth much to you.
But if the snowplow is something you can't use and you really want a lathe, my gut is to go for it (carefully, making sure it's not worn out and busted enough to concern you, or with compensation in tooling, money, or other trade goods if it is).
Look at it this way, if you did both halves of the transaction separately, and dickered down to 800 on both sides before closing the deal, could you still live with it, knowing you got a pretty good deal on the lathe and did not get full value out of the snowplow? If so, go ahead. If it would feel like the amount you saved did not compensate you for the value you lost on the snowplow, then either walk away or see if he will chip in a little. And by swapping straight up, you just saved a ton of time dickering. Reduced hassle on a deal has value to me, but if you like dickering it might not be worth much to you.
But if the snowplow is something you can't use and you really want a lathe, my gut is to go for it (carefully, making sure it's not worn out and busted enough to concern you, or with compensation in tooling, money, or other trade goods if it is).