Hope this may be helpful to the community, here's how we solved it:

from odoo import models, fields, api, _
from odoo.addons import decimal_precision as dp
import logging

_logger = logging.getLogger(__name__)
class ProductPrice(models.TransientModel):
	_name = 'product.price'
	name = fields.Many2one(
		'product.template', 
		string="Product", 
		required=True,
	)

	sale_price = fields.Float(
		string="Sale Price", 
		digits=dp.get_precision('Product Price'),
		required=True,
	)
	
	does_retail_exist = fields.Boolean(
		string="Is there a retail price for this product",
		default=False,
	)
	retail_price = fields.Float(
		string="Retail Price", 
		digits=dp.get_precision('Product Price'),
		required=True,

	)
	does_wholesale_exist = fields.Boolean(
		string="Is there a wholesale price for this product",
		default=False,

	)
	wholesale_price = fields.Float(
		string="Wholesale Price", 
		digits=dp.get_precision('Product Price'),
		required=True,
	)

	def change_product_price(self):
		_logger.info('[CHANGE PRICE]')
		prod_obj = self.env['product.template'].search([('id', '=', self.name.id)])
		
		# Set list price
		if self.does_retail_exist == False:
			prod_value = {'list_price': self.sale_price}
			prod_obj.write(prod_value)
		else:
			prod_value = {'list_price': self.retail_price}
			prod_obj.write(prod_value)
	
		# Set retail and wholesale price if they exist
		for child in prod_obj.item_ids:
			_logger.info('[CHANGE PRICE] - Name: %s Value: %f', child.pricelist_id.name, child.fixed_price)
if child.pricelist_id.name == 'Retail Price': 
				child.write({'fixed_price': self.retail_price})
elif child.pricelist_id.name == 'Wholesale Price': 
				child.write({'fixed_price': self.wholesale_price})
		
		return {
			'name': _('Products'),
			'view_type': 'form',
			'view_mode': 'form',
			'res_model': 'product.template',
			'type': 'ir.actions.act_window',
			'res_id': prod_obj.id,
			'context': self.env.context
		}
	@api.onchange('name')
	def get_price(self):
		_logger.info('[GET PRICE]')
		self.does_retail_exist = False
		self.does_wholesale_exist = False
		self.sale_price = self.name.list_price

	for child in self.name.item_ids:
			_logger.info('[PRODUCT PRICE] - Name: %s Value: %f', child.pricelist_id.name, child.fixed_price)
if child.pricelist_id.name == 'Retail Price': 
				self.does_retail_exist = True
				self.retail_price = child.fixed_price
elif child.pricelist_id.name == 'Wholesale Price': 
				self.does_wholesale_exist = True
				self.wholesale_price = child.fixed_price