Add pricing updates for seer

Author: Alex Krawiec

docs/pricing/index.mdx

@@ -38,6 +38,7 @@ We bill based on the amount of data processed. Each [paid plan](https://sentry.i
 - 1GB of attachments
 - Continuous profiling (available only through PAYG)
 - UI Profiling (available only through PAYG)
+- Seer (available only through purchase of Seer)
 
 On top of that, you can set aside a PAYG budget that can be used to send additional data in any category. Alternatively, you can choose to pay ahead of time to reserve additional volume at a discounted price. Any unused reserved volume will expire at the end of each billing month.
 
@@ -130,6 +131,35 @@ All Sentry plans include one cron monitor and one uptime monitor. Additional mon
 | --------------- | ------------- | --------- | ----------------- | ------------- |
 | >1GB            | $0.2500       | $0.3125   | $0.2500           | $0.3125       |
 
+#### Seer Pricing
+
+Seer is Sentry's AI agent that triages, debugs, and fixes application issues automatically. Access Seer by adding it to your existing subscription for an additional $20 per month. This $20 gives you $25 worth of Seer event credits, which can be used for any combination of [Issue Scans]() or [Issue Fixes]() (see pricing tables below). Any usage beyond this $25 credit will draw from your [PAYG budget]().
+
+More details on how to understand your Seer usage is available here.
+
+#### Issue Scans
+
+Issue Scans automatically classifies and triages issues to determine which are the most likely to be fixable with a code change. Scans are billed per run.
+
+| Issue Scan Volume | Team PAYG     | Business PAYG |
+| ----------------- | ------------- | ------------- | 
+| >0-10k            | $0.0030000    | $0.0030000    |
+| >10k-100k         | $0.0027000    | $0.0027000    |
+| >100k-500k        | $0.0024300    | $0.0024300    | 
+| >500k             | $0.0021870    | $0.0021870    | 
+
+#### Issue Fixes
+
+Issue Fix performs a deep root cause analysis of an issue, using all of the context that is available to Sentry, generating a code fix, and opening a Pull Request in Github.
+
+Issue Fixes are billed per run. Interactions with the same run will only be billed once; restarting a run with the "Start Over" button will be billed as a separate run.
+
+| Team PAYG     | Business PAYG |
+| ------------- | ------------- |
+| $1.00/run     | $1.00/run     |
+
+
+
 ## Billing Cycles
 
 <Alert>
@@ -227,6 +257,7 @@ As of December 1, 2020, customers with a US-based billing address may be subject
 - Texas
 - Tennessee
 - Utah
+- Vermont
 - Washington
 
 ### Canadian Taxes