From CloudModding OoT Wiki
Actor 0x01B8
ovl_En_Gb
Version VRom VRam Size
Debug 00DE5D60 00DE7550 {{{ram-start}}} {{{ram-end}}} 17F0
NTSC 1.0 00EE6060 00EE7790 {{{ram-start}}} {{{ram-end}}} 1730
PAL MQ 00D88D90 00D8A4C0 {{{ram-start}}} {{{ram-end}}} 1730

ovl_En_Gb is the Poe Salesman.

Debug Rom Notes

0xA00 

22D980

22DA20

ROM:0xDE6760 (2406000F) Receive Bottle for finding 10 Big Poes
ROM:0xDE67CC - As above?

ROM:0xDE660C - (2404000A) Amount of Rupees he will buy normal Poe for.
ROM:0xDE66A4 - (24040032) Amount of Rupees he will buy Big Poe for.

ROM:0xDE65F8 - (24060014) What Item (Refer to Event Items!) will be given when you sell him a Poe (Will Replace Bottle with Poe in it) 
ROM:0xDE6694 - (24060014) What Item (Refer to Event Items!) Will be given when you sell him a Big Poe (Will Replace Bottle with Big Poe in it)

ROM:0xDE66B4 - (240103E8) The point amount Required (Default 1000) to receive a Bottle from him.
ROM:0xDE66BC - (24190064) The point amount (Default 100) that a Big Poe is worth.