Offers in excess of, or OIEO is terminology used by some selling agents to imply that you will need to pay more than the advertised figure, this is usually displayed in these formats: £200,000 OIEO or £200,000 Offers In Excess Of. Do you know what OIRO means? ORIO explained. Offers In The Region Of (OIRO) Meaning: This gives the buyer a rough idea of the asking price: the vendor would love something higher but are willing to accept something a little lower. OIRO - How low can you go?!. Guide price explained: Offers in Regions of (OIRO) “Offers in Regions of” gives the buyer a rough idea of how much the seller is asking for.