Is Geron Christian Sr. worth a contract extension?

On overthecap and see Christan Sr. who has played extremely well at RT is on a one year deal. Typical right tackle in free agency go for 15-18M now. Going back and watching bits and pieces of the offense, hes been excellent pass blocking!!! HIs run blocking has been okay but don't really care as much.

HIs PFF grades reflect the same thing…. 79 grade in pass blocking which is very good on their scale. Only allowed 7 hurries and 0 sacks.

So my question is, do you re-sign him? And if you do re-sign him, are you willing to give him the market average of 15 to 18 M per a year?