Lamp oil, you say?

But does he need rope? Bombs?

Maybe not

you forgot robot meeting zerobot

Oh sorry, I’ll still do it, don’t worry

I trust he charges a reasonable price

He’s got what you want, as long as you have enough rubies

Indeed

How about rope? Or bombs?

If he wants it, it's his, my friend. As long as he has enough rupees.

He doesn't give credit though so if not he'll have to come back when he's a little richer